Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?（）

A、Exhaust and scavenging

B、Scavenging and compression

C、Ignition and expansion

D、Exhaust and compression

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第1题

[单选题] Line throwing apparatus aboard ship must contain（）.

A、two rockets，one of which shall be the buoyant type B、three rockets，one of which shall be the buoyant type C、four rockets，two of which shall be the buoyant type D、five rockets，two of which shall be the buoyant type

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第2题

[多选题] The EMP table has some discrepancy in data entry with a particular employee ID. You execute the query as shown in the Exhibit to retrieve all versions of the row that exist between two SCNs.View the Exhibit. Which two statements about the results of the query shown in the Exhibit are correct? （）(Choose two.)

A、The LAST_SCN value in the first row is NULL, which means that the versions of the row still exist at SCN 6636300. B、The LAST_SCN value in the second row in NULL, which means that the version of the row still exists at SCN 6636300. C、The LAST_SCN value in the third row is 6636280, which means that the version of row exists above SCN 6636280. D、The LAST_SCN value in the second row is NULL, which means that the version of the row no longer exists because it was deleted.

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第3题

[多选题] Which two statements are true with regard to policy ordering? （）(Choose two.)

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第4题

[多选题] The PPP over Ethernet Discovery Stage determines which two parameters? （）(Choose two.)

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第5题

[] The operation between two fuel injections is called a working cycle, which consists of a fixed sequence of eventsWhat does "which" mean in this sentence?（）

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第6题

[多选题] The EMP table has some discrepancy in data entry with a particular employee ID. You execute the query as shown in the Exhibit to retrieve all versions of the row that exist between two SCNs. View the Exhibit. Which two statements about the results of the query shown in the Exhibit are correct?（）

A、The LAST_SCN value in the first row is NULL, which means that the versions of the row still exist at SCN 6636300. LAST_SCN B、The LAST_SCN value in the second row in NULL, which means that the version of the row still exists at SCN 6636300. C、The LAST_SCN value in the third row is 6636280, which means that the version of row exists above SCN 6636280. D、The LAST_SCN value in the second row is NULL, which means that the version of the row no longer exists because it was deleted. LAST_SCN

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第7题

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第8题

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