在基因工程中科学家常用细菌、酵母菌等微生物作为受体细胞，原因是

题干

A：结构简单，操作方便

B：繁殖速度快

C：遗传物质含量少

D：性状稳定，变异少

上一题下一题 0.0难度选择题更新时间:2018-11-16 12:30:41

B

根据短文理解，选择正确答案。

Do you like travelling? If so, come to our travel service.

4-day Qingdao Private(私人的) Tour

Qingdao has beautiful sunshine, white beaches and clean water. You can walk along the beaches and enjoy the fresh air.

Price:

1 person	2-5 persons	6-9 persons
￥669	￥550/person	￥530/ person

5-day Taiwan Group Tour

Taiwan is a wonderful place. You can climb A-li Mountain, go boating in Sun Moon Lake.

Price : ￥8,500 Call us at 800-850-8288

8-day London Private Tour

Come to London for a few days to enjoy the Thames(泰晤士河) and visit Big Ben .

Price: ￥16,800 Call us at 800-830-7288

call us at 800-810-6288