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【单选题】
在局部粘膜抗感染免疫中起重要作用的Ig是( )。A.
sIgA
B.
IgG1
C.
IgA
D.
IgG4
E.
IgE
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【单选题】Please turn to you teachers if you have any trouble ______ your studies.
A.
about
B.
with
C.
in
D.
on
【简答题】液压舵机有哪些常见的故障？
【单选题】Passengers to Tianjin please get your tickets ready and wait ___ your turn to board.
A.
for
B.
in
C.
at
【单选题】听力原文：W: Could you please turn down your TV a little? M: Sorry! Are you still preparing for the final exam? Q: Why did the woman ask the man to turn down the TV? (2)
A.
She didn't want to watch TV.
B.
She wanted to go to bed.
C.
She wanted to listen to the radio.
D.
Her study was disturbed.
【单选题】Please __your book and turn to page51
A.
take up
B.
take out
C.
take off
D.
take down
【单选题】听力原文：W: Would you please turn down your radio a little? It's too loud for me to go to sleep. M: I'm terribly sorry to have disturbed you. Q: Why does the man say sorry to the woman? (16)
A.
Because he disliked his radio.
B.
Because he didn't return the radio to the woman.
C.
Because he left his radio too loud.
D.
Because he wanted to go to bed.
【简答题】液压舵机常见故障有哪些？如何排除？
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