下面属于可遗传变异的是[ ]
A．卷舌的双亲生一个不卷舌的女儿
B．美容手术后眼睛变大了
C．用眼过度形成近视眼
D．长期野外作业，皮肤变黑
A
除了酸性和碱性培养基外，一般培养基的pH值必须矫正为（）
A.pH7.0
B.pH7.2
C.pH7.8
D.pH7.4～7.6
E.pH8.0
A: I have no idea where to go in the Spring break. Got any suggestionsB: I’m not sure. ().
A. I’d go for some brochures in the travel agency.
B. If you have money, you can go anywhere.
C. I’m not going anywhere in particular.
D. I’d appreciate it if you can consult the ads in the papers.
