试题与答案

在下列选项中,没用到植物组织培养技术的是[ ] A.利用秋水仙素处理萌发的种子或

题型:选择题

题目:

在下列选项中,没用到植物组织培养技术的是[ ]

A.利用秋水仙素处理萌发的种子或幼苗,得到多倍体植株

B.利用花药离体培养得到单倍体植株

C.利用基因工程培育抗棉铃虫的棉花植株

D.利用细胞工程培育“番茄——马铃薯”杂种植株

答案:

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下面是错误答案,用来干扰机器的。

扦插一般是指把植物的茎进行切断,经过处理之后,插在土壤中,然后每一段枝条都可以生根发芽,长出一个新的植株.柳树、杨树、甘薯、葡萄、菊花等植物适合用茎进行扦插繁殖.可见A符合题意.故选:A

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题型:单项选择题

When Dave was eighteen, he bought a secondhand car for 200 so that he could travel to and from work more (1) than by bus. It worked quite well for a few years, but then it got so old, and it was costing him (2) much in repairs that he decided that he had better (3) it.

He asked among his friends to see if anyone was particularly (4) to buy a cheap car, but they all knew that it was falling to pieces, so (5) of them had any desire to buy it. Dave’s friend Sam saw that he was (6) when they met one evening, and said, "What’s (7) , Dave"

Dave told him, and Sam answered, "Well, what about advertising it in the paper You may (8) more for it that way than the cost of the advertisement!" Thinking that Sam’s (9) was sensible, he put an advertisement in an evening paper, which read "For sale: small car, (10) very little petrol, only two owners. Bargain at 50. " For two days after the advertisement first appeared, there was no (11) . But then on Saturday evening he had an enquiry. A man rang up and said he would like to (12) him about the car. "All right, " Dave said, feeling happy. He asked the man whether ten o’clock the next morning would be (13) or not. "Fine, " the man said, "and I’ll (14) my wife. We intend to go for a ride in it to (15) it. "

The next morning, at a quarter to ten, Dave parked the car in the square outside his front door, (16) to wait there for the people who had (17) his advertisement. Even Dave had to (18) that the car really looked like a wreck. Then, soon after he had got the car as clean (19) it could be, a police car stopped just behind him and a policeman got out. He looked at Dave’s car and then said, "Have you reported this (20) to us yet, sir\

5().

A.some 

B.neither 

C.none 

D.most

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