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【单选题】
在常规制片HE染色中,细胞核的染色原理是
A.
细胞核带正电荷,呈碱性,易与带负电荷的苏木素碱性染料结合而染色
B.
细胞核带负电荷,呈碱性,易与带正电荷的苏木素碱性染料结合而染色
C.
细胞核带负电荷,里酸性,易与带正电荷的苏木素酸性染料结合而染色
D.
细胞核带正电荷,呈酸性,易与带负电荷的苏木素碱性染料结合而染色
E.
细胞核带负电荷,呈酸性,易与带正电荷的苏木素碱性染料结合而染色
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【判断题】In the use of sources, we need to keep direct quotation to the minimum.
A.
正确
B.
错误
【多选题】自然地理环境由四个基本地圈构成,分别是()、()、()和()。
A.
对流圈
B.
水圈
C.
沉积岩石圈
D.
生物圈
【单选题】The use of transformer oil in a minimum-oil circuit breaker is ()
A.
to quench the arc and establish an insulated break between the contacts.
B.
to quench the arc and build insulation between the arc-quenching chamber and ground
C.
to establish an insulated break between the contacts and build insulation between the arc-quenching chamber and ground.
D.
to protect the circuit breaker from firing
【单选题】The wear of two metal surfaces can be reduced to minimum by use of ______.
A.
a suitable lubricant
B.
a proper coolant
C.
a sealing agent
D.
a hydraulic fluid
【单选题】— What's the _____, John? — I have got the flu. [     ]
A.
weather
B.
matter
C.
wrong
【单选题】She wore long, heavy dresses, clothes that allowed______movement.
A.
minimum of
B.
the minimum for
C.
her minimum of
D.
a minimum of
【单选题】By regulation,you MUST keep a record of the use of your radiotelephone for a minimum of().
A.
six months
B.
one year
C.
two years
D.
thirty months
【多选题】哪些方面的课程可能是电气工程专业需要学习的?
A.
数学方面的课程
B.
语言学
C.
电路
D.
磁路
E.
电器设备如洗衣机,电磁炉
【简答题】自然地理环境由 、 、 和 四个基本地圈组成。
【单选题】-I'm afraid I've got terrible flu. -( ).A: Never mindB: Keep away from meC: You&
A.
-I'm afraid I've got terrible flu. -( ). A: Never mind
B.
Keep away from me
C.
You'd better go and see a doctor
D.
You need to be more careful
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