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【单选题】
下列关于实物标准不正确的是A.
实物标准是一种标准样品
B.
大多数商品标准都是实物标准
C.
实物标准是文件标准的补充
D.
实物标准要经常更新
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反馈参考答案：
举一反三
【简答题】(As long as you clear your desk by this evening), you can have tomorrow off.
【单选题】一般说来,只要空间中有变化的磁场,就会在导体内产生环形电流,称为涡流。这种电流跟我们平常使用的家用电路中的电流是有区别的,其热效应可用于加热物体。下列哪个生活物品是利用这一原理制作而成
A.
微波炉
B.
高压静电除尘
C.
电磁炉
D.
电热水器
【单选题】–Have you taken your medicine today ? --Yes , I ______ it after breakfast.
A.
have taken
B.
took
C.
will take
D.
take
【简答题】Have you ever met with this case in your life you can't understand others even if they have saiHave you ever met with this case in your life ____ you can't understand others even if they have sai...
【简答题】C Can you train your cat to actually use your toilet? Can you not have to deal with litter boxes any more? Well for many people the answers to these questions are yes． You may have heard that some peo...
【单选题】-Can I borrow your dictionary? -Certainly. You can __________ it as long as you like. [ ]
A.
lend
B.
take
C.
borrow
D.
keep
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