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【单选题】
Centrifugal pumps have what advantage（s）over reciprocating pumps ________．A.
They are less expensive
B.
They are smaller for equivalent pumping ability
C.
They pump more cargo in less time
D.
All of the above
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【单选题】在PBMC悬液中加入直径为3μm的羟基铁粉颗粒，置37℃中充分反应后，上层液中的主要细胞是
A.
B细胞
B.
T细胞
C.
单核细胞
D.
淋巴细胞
E.
PBMC中混入的杂质细胞
【单选题】在 PBMC 悬液中加入直径为3μm 的羟基铁颗粒,置37℃,充分反应后,沉于有磁铁的管底的 是
A.
淋巴细胞
B.
单核细胞
C.
B细胞
D.
T细胞
E.
PBMC中混入的杂质细胞
【单选题】The key to our room was ( ) to a large plastic plate with the room number on it.
A.
attached
B.
connected
C.
joined
D.
related
【简答题】the key to our room was______________ to a large plastic bolck with teh room number on it.
【简答题】The key to our room was ___a______ to a large ____p____ block with the room number on it. 我们的房门钥匙系在一块标有房间号的大塑料板上。
【单选题】Speaker A: We can’t find the key to our room. Speaker B: ___________.
A.
You can close the window.
B.
You’d better go to the reception desk. You may ask her to repeat.
【简答题】The key to our room was _____系在 to a large plastic block with the room number on it. When leaving the hotel, a ____ 客人 was encouraged to turn in the key, either by handing it to an ____ or by dropping...
【简答题】一. 请将下列句子翻译成汉语: 1. The key to our room was attached to a large plastic block with the room number on it. 2. Because the key slot was narrow, the key had to be positioned carefully to fit into it. 3. I...
【简答题】我们的房门钥匙系在一块标有房间号的大塑料板上。 The key to our room was _________ to a large ________ block with the room number on it.
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