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【单选题】
关于成熟红细胞,不正确的描述是:
A.
双凹圆盘状
B.
直径约7~8ym
C.
有一个核
D.
胞质内含血红蛋白
E.
能运送氧气和二氧化碳
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参考答案:
举一反三
【单选题】She looked up his number in the phone book to ______ that she had got it right.
A.
make up her mind
B.
make up
C.
make a decision
D.
make sure
【单选题】She looked up for a moment, then _______ drawing.
A.
retired
B.
spent
C.
kept
D.
continued
【单选题】She looked up and this time she did not______, but gazed at him blankly, as if she didn't recognize him.
A.
turn down
B.
turn away
C.
turn up
D.
turn off
【判断题】非法集资造成的资金损失是受法律保护的。( )
A.
正确
B.
错误
【单选题】She looked up _______________, and then continued drawing.
A.
at the moment
B.
for a moment
C.
at that moment
D.
at this moment
【判断题】射频识别技术是一种非接触式的自动识别技术,可识别高速运动的物体,并可同时识别多个对象。
A.
正确
B.
错误
【单选题】非法集资造成的资金损失受法律保护吗?
A.
B.
【单选题】RFID技术是一种非接触式的自动识别技术,它读卡的距离最远可超过 米。
A.
5
B.
10
C.
15
D.
20
【单选题】有用信号频率低于 10Hz , 可以选用( )。
A.
低通滤波器
B.
高通滤波器
C.
带通滤波器
D.
带阻滤波器
【简答题】When asked why she was late again for work she looked up, her mouth being __________ (tremble).
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