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【单选题】
浆细胞胞质呈嗜碱性是由于:A.
有丰富的粗面内质网
B.
线粒体丰富
C.
滑面内质网丰富
D.
溶酶体丰富
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举一反三
【单选题】the grand graduation ceremony ,which thousands of the graduates _____ last night, was more succe
A.
30. the grand graduation ceremony ,which thousands of the graduates _____ last night, was more successful than we had expected. A．appointed
B.
absorbed
C.
attended
D.
attracted
【单选题】—Did you attend the opening ceremony of The Voice of China last week? —Sorry! We ________ it, but we had a terrible traffic accident on our way.
A.
must have attended
B.
must attend
C.
could have attended
D.
could attend
【简答题】当电流、电压为关联参考方向时,____可表示为电路中通过电阻的电流,与电阻两端所加的电压成正比,与电阻成反比 。
【简答题】They held an opening ceremony last month.(改被动句) An opening ceremony _______ ________ last month.
【单选题】To our relief, at last the opening ceremony of the sports meeting we had been looking forward to _____ on time. [ ]
A.
had started
B.
starting
C.
started
D.
being started
【简答题】外呼吸包括 、 ,内呼吸包括 、 。
【单选题】下列说法不正确的是
A.
电解质溶液的渗透压大于同等物质的量浓度的非电解质溶液的渗透压
B.
制备PH=5的缓冲体系，最好选用Pka约为5的酸及其盐
C.
一个共轭酸碱对的Ka×Kb=Kw
D.
加入一种相同的离子到弱酸溶液中，弱酸的PH值和电离度均增加
E.
酸碱质子理论认为：凡能给出质子的物质都是酸，凡能接受质子的物质都是碱
【简答题】导体中电流与这导体两端 ( ) 成正比,与导体的 ( ) 成反比。 2、全电路欧姆定律的内容是:闭合电路中的电流与 ( )成正比, 与 ( )成反比。 3、已知电炉丝的电阻是44几,通过的电流是5A,则电炉所加的电压是 ( ) V 4、电源电动势E=4.5V,内阻r=0.5几,负载电阻R=4几,则电路中的电流I=...
【单选题】Last night, there were millions of people _______ the opening ceremony live on TV.
A.
watch
B.
to watch
C.
watched
D.
watching
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