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【单选题】
形成潜影的首要条件是
A.
卤化银晶体
B.
卤化银晶体吸收了光子
C.
晶体结构的物理完整性
D.
自发氧化还原
E.
乳剂中无杂质质点的干扰
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参考答案:
举一反三
【单选题】导游服务的社会效益主要是通过()来实现的。
A.
渊博的导游知识
B.
服务意识
C.
良好的心理素质
D.
优质的服务水平
【简答题】What are the two kinds of sleep we experience every night? Every night we have two kinds of sleep: active sleep and
【判断题】旋风分离器体积相比于重力分离器更小,但是处理效果不如重力分离器。
A.
正确
B.
错误
【判断题】滚动轴承游隙可分为原始、安装、工作游隙三种。
A.
正确
B.
错误
【判断题】透平油是供给机组轴承的润滑油和操作用的压力油,作用是润滑、散热及传递能量
A.
正确
B.
错误
【单选题】There are two kinds of cross-cultural communication: unilateral communication and _________.
A.
successful communication
B.
verbal communication
C.
bilateral communication
D.
unsuccessful communication
【简答题】阅读短文,用适当的词填空,使短文意思完整。 There are two main kinds of sports. These two kinds of sports are team sports and individual(个人的) sports. Team sports are such sports as baseball, basketball, and 1 . Team sports...
【判断题】双组分丙烯酸聚氨酯底漆一般小面积修补直接用于金属上或磷化底漆、环氧底漆等表面。()
A.
正确
B.
错误
【多选题】国家知识产权局专利检索系统提供的检索方式有
A.
常规检索
B.
高级检索
C.
导航检索
D.
命令行检索
【单选题】What's the difference between the two phases of experiments?
A.
The two kinds of vaccines were vaccinated together on volunteers in the first phase.
B.
The two kinds of vaccines will be vaccinated together on volunteers in the second phase.
C.
The combined safety of vaccines had been tested in the first phase.
D.
The safety of each vaccine will be tested in the second phase.
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