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【单选题】
下列关于“探索生长素类似物促进插条生根的最适浓度”探究过程的说法不正确的是（）A.
在正式实验前先做一个预实验，目的是为正式实验摸索条件
B.
找准枝条的上下端，防止颠倒
C.
所用每个枝条都应留3---4个芽
D.
此探究活动中不存在对照实验
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】“I usually go to work by bus.”“Why notby bike for a change?”()
A.
trying to go
B.
try going
C.
to try going
D.
try go
【多选题】下列各项中,属于保管期满不得销毁的会计档案有( )。
A.
保管期满但未结清的债权债务原始凭证
B.
涉及未了事项的原始凭证
C.
涉及已完工交付使用项目的建设单位，其保管期满的会计档案
D.
正处于项目建设期间的建设单位，其保管期满的会计档案
【单选题】—How do you go to work? —I usually go to work _____.
A.
by a car
B.
in a car
C.
on car
D.
by car
【单选题】I usually go to work on foot, but if the weather is bad, I will go by bus.我经常步行上班，如果天气不好，我会坐公交。 01010026
A.
I usually go to work by bus.
B.
I often go to work on foot.
C.
I never go to work on foot.
D.
I never go to work by bus.
【简答题】I usually go to work ____ bike.
【单选题】—I'm doing a survey. Could you tell me ______? —Sure. I usually go to work at 7:00 am.
A.
why you go to work
B.
how you go to work
C.
when you go to work
D.
who you go to work with
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