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【多选题】
关于纸色谱的叙述正确的是A.
纸色谱属于正相色谱
B.
纸色谱的固定
C.
纸色谱的固定滤纸纤维上的羟基
D.
纸色谱属于分配色谱
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】下列哪项是导致心搏骤停的非心源性常见原因:
A.
溺水、低血容量、冠心病
B.
严重低血钾、低血钠等电解质絮乱
C.
低血容量、急性心肌炎
D.
过敏反应、高龄、中暑
E.
急性中毒、严重创伤、高血钾
【简答题】It was so late that it was futile to try to catch the train. The word “futile” means “_____________________________________”.
【单选题】But Ato's decision to ban e-mails is likely to be futile, as the other messaging methods can be equally _____.
A.
distracted
B.
distract
C.
distraction
D.
distracting
【单选题】The attempts to prevent migration are futile and wrong. It is a violation of people’s right.
A.
going against
B.
division
C.
defending
D.
prevention
【单选题】The government’s efforts to __________________ inflation proved to be futile.
A.
counterculturist
B.
counteract
C.
counterpart
D.
countercharge
【单选题】The author's purpose in this passage is to______.
A.
define the economic terms used in discussion of employment
B.
criticize the decisions of past administrations during recession years
C.
call for the application of positive economic control policies in the year that lie ahead
D.
allay current fears about increasing unemployment
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