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【简答题】
纳米是一种长度单位，它用来表示最小的长度，1纳米等于10亿分之一米，那么0.02014厘米等于______纳米．
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】1999年WHO／ISH高血压处理指南规定2级高血压是(mmHg)
A.
收缩压130～139和(或)舒张压85～89
B.
收缩压140～149和(或)舒张压90～94
C.
收缩压140～159和(或)舒张压90～99
D.
收缩压160～179和(或)舒张压100～109
E.
收缩压≥180和(或)舒张压≥110
【单选题】Every minute must be made full use ______ at the preparations for the exams.
A.
of to work
B.
of work
C.
of working
D.
to working
【单选题】下列关于风媒花的适应性特征说法错误的是( )。
A.
花小，被没有鲜艳的颜色甚至退化，形成密集的花序，常先叶开花
B.
雄蕊花丝细长，开花时伸出花外
C.
花粉粒体积大，有粘性物质分泌
D.
雌蕊柱头较长，常呈羽毛状等形状
【单选题】Every minute must be made full use of ______ our lessons, for the college entrance exam is coming.
A.
going over
B.
to go over
C.
go over
D.
our going over
【单选题】Every minute must be made full use of ____ our lessons, for the final examination is coming.
A.
going over
B.
to go over
C.
go over
D.
to going over
【简答题】Every minute must be made full use of ________ our lessons, for the college entrance exam is coming. [A] going over [B] to go over [C] go over [D] our going over
【单选题】Every minute must be made full use of________spoken English.
A.
to practise
B.
practising
C.
to practising
D.
practice
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