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【单选题】
According to the author，which of the following most interested the researchers?A.
The mice that started dieting in old age．
B.
27 of those 46 0ld genes that continued to behave like young genes．
C.
Calorie restriction that works in people．
D.
Dieting that makes sure a drug is effective．
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【单选题】听力原文：M: The violin sounds awful. W: I know. I wish we could get a refund. This performance is the worst I've ever been to. Q: Where are these people talking? (14)
A.
They are at a violin shop.
B.
They are at a circus.
C.
They are at a concert.
D.
They are inside a movie theatre.
【单选题】听力原文：M: The violin sounds awful. W: I know, I wish we could get a refund. This performance is the worst I've ever been to. Q: Where are these people talking? (14)
A.
They are at a violin shop.
B.
They axe at a circus.
C.
They are at a concert.
D.
They are inside a movie theatre
【单选题】The general purpose of a heat exchanger is to _____.
A.
eliminate hot air from the condenser
B.
maintain steady pressure in a system
C.
heat, or cool one fluid by means of another fluid
D.
reduce the engine room temperature in tropical climates
【单选题】The rate of heat transfer between the hot and cold fluids passing through a shell-and-tube type heat exchanger will （）.
A.
remain constant along the tubes length
B.
be greatest in a single pass counter flow heat exchanger
C.
remain constant throughout the heat exchanger
D.
vary from section to section through out the heat exchanger
【单选题】第二组 The only attention that heat exchanger should require is to ensure that the heat transfer surfaces remain substantially clean and the flow passages generally clear of obstruction. Indication that ...
A.
the heat exchanger lube oil inlet temperature lowering
B.
the heat exchanger sea-water outlet pressure rise
C.
the heat exchanger temperature difference between lube oil and sea water increasing
D.
the heat exchanger pressure difference between sea water inlet and outlet decreasing
【单选题】According to the passage, it is recommended that the heat exchanger side be cleaned by .
A.
flushing with chemical solvent without being dismantled
B.
brushing mechanically after being disassembled
C.
flushing with flesh water only
D.
flushing with clean oil only
【单选题】听力原文：M: How was your weekend? W: It was awful. M: Awful? Really? But I thought you were supposed to be going on a trip. Did it get cancelled? W: No, unfortunately, it wouldn't been better if it had. M...
A.
April this year, 3.
B.
March this year, 3.
C.
April this year, 4.
D.
March this year, 4.
【单选题】听力原文：W: I have to take examination everyday next week. It's awful. M: It's OK for me, I'm having examinations on Monday, Tuesday and Friday. I have none on Wednesday and Thursday. I am thankful for th...
A.
Every day except Thursday.
B.
Monday, Tuesday, and Friday.
C.
Monday, Wednesday, and Friday.
【单选题】听力原文：M: I thought it was awful the way everybody at the football game booed and whistled at the goalkeeper. W: Me too. Though no one knew at the time that he'd broken his wrist. Q: What does the man m...
A.
Nobody knew how much the yelling bothered the goalkeeper.
B.
There was a good reason for the goalkeeper's poor play.
C.
The goalkeeper deserved to be criticized
D.
Few players break their wrists at football games.
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