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【题目】如图所示为“绿叶中色素的提取和分离”实验的部分材料和用具。下列叙述错误的是 ( )
A.图中①加入研钵内的物质有无水乙醇、SiO2和CaCO3
B.将研磨液倒入图中②的漏斗内,漏斗底部应放一块单层尼龙布
C.图中③画滤液细线的要求是细、齐、直
D.图中④随层析液在滤纸条上扩散速度最快的色素为黄绿色
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【题目】 Do you believe scientists will ___________ a cure for cancer in the near future?
A. come up B. come up with
C. come about D. bring about
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【题目】My English teacher’s humor was________ make every student burst into laughter.
A. so as to B. such as to
C. such that D. so that
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【题目】—How often do you eat out?
—________,but usually once a week.
A.Have no idea B.It depends
C.As usual D.Generally speaking
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【题目】 —Maggie had a wonderful time at the party.
—________, and so did I.
A. So she had B. So had she
C. So she did D. So did she
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【题目】 I can’t concentrate ________ my lessons unless I’m free ________ noise.
A. on; with B. at; from C. with; of D. on; of
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【题目】
She writes very well that English isn't her first language.
A. seeing
B. supposing
C. judging
D. providing
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【题目】 Personally, I think modern education is __________sitting at a desk and looking at the blackboard.
A. more than B. no more than
C. less than D. no less than
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【题目】如图是某低等海洋动物完成某反射的反射弧模式图。下列叙述不正确的是
A.a处接受适宜的电刺激,b处能测到电位变化
B.兴奋每传递一次都会导致突触前膜的面积增大
C.图中有三个神经元,a处兴奋传导的速率大于c处
D.若将神经纤维置于高Na+环境中,静息电位将变大
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【题目】So long as you get on line, you'll have to be faced with news on _______ aspects.
A. all sorts of
B. a great deal of
C. a large amount of
D. the number of
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