27. With the help of some witnesses, three criminals were caught and asked to aid in the ________.
A. interview B. investigation C. question D. request
26. The doctor told Mary that too much ________ to the sun is bad for the skin.
A. exposure B. extension C. exhibition D. expansion
25. Nowadays, to lose weight, more wise ladies prefer to ________ regularly rather than take expensive weight-losing pills.
A. hang out B. turn up C. work out D. figure up
24. It was reported that 115 miners ________ in the flooded mine for eight days were pulled out alive at last.
A. transformed B. trapped C. defeated D. stained
23. I feel sorry for those young people who don’t ________ their aged people as I do mine.
A. send for B. take for C. look for D. care for
22. Unemployment is on the increase. A growing number of young people, ________, are finding themselves out of work.
A. in case B. all in all C. in particular D. in total
第一節(jié):多項選擇(共10小題,每小題1分,滿分10分)
從A、B、C、D四個選項中選出可以填入空白處的最佳選項,并在答題卡上將該項涂黑。
21. -Flight 331 is being ________. I’d better be on my way. Goodbye.
-Bye. Happy landing!
A. appealed B. announced C. commanded D. delivered
34.
(9分)(注意:在試題卷上作答無效。)
請回答下列有關(guān)生命科學(xué)實驗的問題。
⑴右圖是顫藻和水綿細(xì)胞的比較觀察,其中乙生物是__________,從細(xì)胞的結(jié)構(gòu)可以判斷該生物屬于________(真核/原核)生物。
⑵在低倍鏡及高倍鏡下看到以下洋蔥根尖細(xì)胞圖,做“觀察植物細(xì)胞的有絲分裂”實驗時,主要觀察圖_______處的細(xì)胞;圖B細(xì)胞所在區(qū)域稱為________________區(qū)。
![]()
![]()
![]()
A B
![]()
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C D
⑶檢查某種毒物是否能改變細(xì)胞染色體的數(shù)目,最好選用細(xì)胞分裂到__________期的細(xì)胞用顯微鏡進(jìn)行觀察。
⑷某同學(xué)按下表所示制成臨時裝片進(jìn)行有關(guān)實驗。
|
組別 |
材料 |
實驗條件 |
觀察內(nèi)容 |
|
A |
紫色洋蔥鱗片葉外表皮 |
清水、解離液、0.3g/ml蔗糖溶液 |
質(zhì)壁分離 |
|
B |
紫色洋蔥鱗片葉外表皮 |
0.3g/ml蔗糖溶液 |
質(zhì)壁分離 |
請回答以下問題:
①上述實驗中用引流法滴加蔗糖溶液,目的是________________________。
②在A組實驗中,顯微鏡下看不到質(zhì)壁分離現(xiàn)象,原因是_____________被破壞,失去了選擇透過性。
⑸在提取葉綠體色素的過程中,研磨葉片通常需加少量二氧化硅、碳酸鈣及適量丙酮。碳酸鈣的作用是______________________,丙酮的作用_____________________。
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