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【单选题】
在分光光度法中,如果显色剂本身有色,而且试样显色后在测定中发现其吸光度很小时,用( )作空白溶液。
A.
空气
B.
蒸馏水
C.
显色剂
D.
试样
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参考答案:
举一反三
【单选题】我某外贸企业于某月10日向斯里兰卡发邮件,限15日复到有效,对方于14日发邮件 接受通知,由于邮件服务器的故障,该外贸企业等到16日才完整收到接受邮件,事后该外贸企业并未表态,那么( )
A.
除非发盘人及时提出异议,否则,该逾期接受仍具有效力
B.
该逾期接受丧失接受效力,合同不成立
C.
只有发盘人毫不迟疑地表示确认,该通知才具有接受效力,否则合同不成立
D.
只有发盘人发出接受通知,合同才成立
【简答题】JT4系列为交流通用继电器,在这种继电器的电磁系统上装设不同的线圈,便可制 成 、 、 或 继电器 。
【简答题】The young man was r______ by everyone for his bravery.
【单选题】The young man was greatly taken aback by the news that the police intended to prosecute him.
A.
astonished
B.
disturbed
C.
stumbled
D.
baffled
【单选题】The young man was deeply hurt because his proposal was rejected and, to a certain extent, ______ at by the group's members.
A.
sneered
B.
smiled
C.
simulated
D.
stimulated
【单选题】将原料肉经机械的作用又大变小的过程称为
A.
粉碎、切割或斩拌
B.
混合
C.
乳化
D.
腌制
【简答题】JT4系列为交流通用继电器,在这种继电器的电磁系统上装设不同的线圈,便可制成(............) 、(............) 、(............) 或(............) 等继电器。
【单选题】The incinerator air fan is installed to supply air for the following except_____.
A.
combustion
B.
vaporization
C.
cooling
D.
dilution
【单选题】The young man was all Englishman. but the writer was not.
A.
True.
B.
False.
【简答题】Tomorrow was his girlfriend’s birthday and the young man was having a difficult time deciding on a present for her. She already had more clothes than she knew what to do with them, so he couldn’t get ...
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