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【单选题】
S7-200PLC的取整指令的梯形图指令的操作码是( )。A.
TRUNC
B.
ROUND
C.
EXP
D.
LN
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【简答题】通气/血流比值是指______和______的比值。正常人安静时，通气/血流比值为______，比值减小，说明______；比值增大，说明______。
【简答题】Sam: Hey, Maria and John. This Thursday is Bill’s birthday. Let’s think about the presents. Maria: Sure, Sam. I want to give him a computer . Sam: No, Bill never plays computer s. John: I want...
【单选题】This place is not big enough for Lucy’s birthday party. We should find a one.
A.
big
B.
small
C.
bigger
D.
smaller
【单选题】The first one I ever got was a birthday cake snow globe on my birthday. In fact, I think it's probably my _______ favorite. [ ]
A.
nine
B.
nineth
C.
ninth
【单选题】关于通气/血流比值，下列叙述错误的是（）。
A.
通气/血流比值是每分钟肺泡通气量与肺血流量之间的比值，正确值为0.84
B.
通气/血流比值减小，意味着生理无效腔增大
C.
肺尖部增加，通气/血流比值可达3
D.
肺下部部分血液得不到充分气体交换，通气/血流比值减小
E.
肺动脉栓塞时，通气/血流比值增大
【单选题】It’s _________ of Amy to make the birthday card than ________ one.
A.
much clever, to buy
B.
cleverer, to buy
C.
cleverer, buying
D.
most clever, buy
【简答题】阅读理解。 A child's birthday party should be one of the most fun s of the year, for the birthday child, the guests and even for the hosts. The three keys to a successful child's birthday party is pla...
【简答题】make one’s birthday
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