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【单选题】
以下违反显微镜操作规范的有A.
将树胶加入油镜观察
B.
油镜使用用二甲苯擦拭
C.
无水乙醇擦拭镜头
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反馈参考答案：
举一反三
【单选题】Currently, there is a(n) ______ in the number of childless marriages.
A.
increase
B.
decrease
C.
don’t know
【判断题】There is currently no specific medication for the virus and treatment is supportive care.
A.
正确
B.
错误
【单选题】Analyze the following statement, and then choose one of the options that you think is best to use in academic writing:Currently, there is no capacity for higher nanoparticle removal method efficiency.
A.
Currently, there is no capacity for methods of higher nanoparticle removal efficiency.
B.
Currently, there are no capacities for higher nanoparticle removal method efficiencies.
C.
Nowadays, there is no capacity for higher nanoparticle removal method efficiency.
D.
There is no capacity for the development for higher nanoparticle removal at the present time.
E.
Currently, methods to more efficiently remove nanoparticles are lacking.
【判断题】There is currently no specific medication for the Novel Coronavirus and treatment is supportive care.
A.
正确
B.
错误
【单选题】A company plans to product 2,400 units of products in the next month. 3kg of raw material is required to produce each unit of product. Currently there is raw material inventories of 1,500kg, and it pl...
A.
7,200
B.
8,700
C.
7,700
D.
6,700
【简答题】there is currently a _______
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