第1题：
A. the cause of routing errors.
B. the number of switches on the network.
C. the number of users on the network.
D. where network latency will occur.
第2题：
Fires of which class would most likely occur in the engine room of a vessel ________．
A.Classes A and B
B.Classes B and C
C.Classes C and D
D.Classes A and D
第3题：
If scavenge box should be hot, _______would occur.
A.seized piston
B.defective atomizer
C.scavenge fire
D.too much L.O
第4题：
需氧呼吸（aerobic respiration）
第5题：
第6题：
A.The number of collision domains would decrease.
B.The number of collision domains would increase.
C.The number of broadcast domains would remain the same.
D.The number of collision domains would remain the same.
E. The number of broadcast domains would increase.
第7题：
In reviving a person who has been overcome by gas fumes，what would you AVOID doing?_________.
A.Giving stimulants
B.Prompt removal of the patient from the suffocating atmosphere
C.Applying artificial respiration and massage
D.Keeping the patient warm and comfortable
第8题：
[ A] application
[ B] endurance
[ C] expectancy
[ D] extension
第9题：
第10题：
需氧酶 aerobic enzyme