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【单选题】

A customer states that they cannot print from their laser printer. The printer displays a &lsquo;Paper Jam&rsquo; error. Upon inspection there is no paper jam. The only indication is a clicking sound when the user tries to print.<br /> Which of the following is the MOST likely cause?()

A、Feed roller gear is broken.

B、Feed rollers are dirty.

C、Fuser has overheated.

D、Toner cartridge needs to be replaced.

更多“ A customer states that they cannot print from their laser printer. The printer displays a &lsquo;Paper Jam&rsquo; error. Upon inspection there is no paper jam. The only indication is a clicking sound when the user tries to print.<br /> Which of the following is the MOST likely cause?()”相关的问题
第1题

AAmerican Bureau of Shipping  B、National Cargo Bureau  C、United States Coast Guard  D、United States Customs  

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第5题

A、SELECT customer_id, customer_name FROM customers WHERE postal_code CONTAINS NULL;  B、SELECT customer_id, customer_name FROM customers WHER postal_code = ' ___________';  C、SELECT customer_id, customer_name FROM customers WHERE postal _ code IS NULL;  D、SELECT customer_id, customer_name FROM customers WHERE postal code IS NVL;  E、SELECT customer_id, customer_name FROM customers WHERE postal_code = NULL;  

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第6题

A、SELECT customer_id, customer_name FROM customers WHERE postal_code CONTAINS NULL;  B、SELECT customer_id, customer_name FROM customers WHER postal_code = ' ___________';  C、SELECT customer_id, customer_name FROM customers WHERE postal _ code IS NULL;  D、SELECT customer_id, customer_name FROM customers WHERE postal code IS NVL;  E、SELECT customer_id, customer_name FROM customers WHERE postal_code = NULL;  

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第7题

A、Japan  B、Belgium  C、the Netherlands  D、the United States  

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第8题

A、exstart state&gt;exchange state&gt;loading state&gt;full state  B、exstart state&gt;full state&gt;loading state&gt;exchange state  C、Loading state&gt;exchange state&gt;full state&gt;exstart state  D、exstart state&gt;loading state&gt;exchange state&gt;full state  

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第9题

AA. exstart state&gt;exchange state&gt;loading state&gt;full state  B、B. exstart state&gt;full state&gt;loading state&gt;exchange state  C、C. Loading state&gt;exchange state&gt;full state&gt;exstart state  D、D. exstart state&gt;loading state&gt;exchange state&gt;full state  

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第10题

A、SELECT city_address, COUNT(*) FROM customers WHERE city _ address IN ('Los Angeles','San Fransisco');  B、SELECT city_address, COUNT (*) FROM customers WHERE city address IN ( 'Los Angeles', 'San Fransisco') GROUP BY city_address;  C、SELECT city_address, COUNT(customer_id) FROM customers WHERE city_address IN ( 'Los Angeles', 'San Fransisco') GROUP BY city_address, customer_ id;  D、SELECT city_address, COUNT (customer_id) FROM customers GROUP BY city_ address IN ('Los Angeles','San Fransisco');  

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