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【单选题】
下列说法不正确的是()
A.
一切初等函数在其定义区间上都存在原函数
B.
不连续的函数也可能存在原函数
C.
奇函数的原函数都是偶函数
D.
偶函数的原函数都是奇函数
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【单选题】图中2所指的表面结构要求Ra的上限值是:【图片】
A.
25 μ m
B.
1.6 μ m
C.
3.2 μ m
D.
都不正确
【简答题】U1 Additional Language Quiz There are ten sentences in this section. Beneath each sentence there are four words or phrases marked A, B, C and D. Choose one word or phrase that best completes the sente...
【单选题】图中2所指的表面结构要求Ra的上限值是:
A.
1.6 μ m
B.
3.2 μ m
C.
6.3 μ m
【简答题】U3 Additional Language Quiz There are ten sentences in this section. Beneath each sentence there are four choices or phrases marked A, B, C and D. Choose one word or phrase that best completes the sen...
【单选题】The little chick ______ the earthworm, deciding whether to swallow it or let it go ? [     ]
A.
stared at
B.
glimpsed at
C.
looked into
D.
glared at
【单选题】The little chick ________ the earthworm, deciding whether to swallow it or let it go. [     ]
A.
glimpsed at
B.
looked into
C.
stared at
D.
glared at
【单选题】图中2所指的表面结构要求Ra的上限值是:
A.
None
B.
25 μ m
C.
1.6 μ m
D.
3.2 μ m
【单选题】图中2所指的表面结构要求Ra的上限值是:【图片】
A.
1.6 μ m
B.
3.2 μ m
C.
25 μ m
D.
None
【简答题】The children looked wonderfully (health) ______ with their bright eyes and glowing cheeks.
【单选题】cheeks/chicks
A.
What lovely chicks she has!
B.
What lovely cheeks she has!
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