HAT培养基的主要成分是：（)。

A.HAT培养基

B.DMEM培养基

C.MEM培养基

D.干细胞培养基

A.杂交瘤细胞

B.脾脏细胞

C.骨髓瘤细胞

D.肾脏细胞

A.分子伴侣

B.PPI

C.HAT

D.PDI

A.familiar to

B.similar to

C.familiar with

D.similar with

A．He is blamed for the depression in the American hat industry.

B．He is a good example that an influential person sets a fashion.

C．He is a typical case showing American changing fashions.

D．He is the only man in America who didn't wear a hat outdoors.

He put on his hat, ________________(拿起拐杖),and went out.

.

A) While B) If

C) When D) Because

A.took off

B.tried on

C.put away

D.hung up

By saying hat the Greenland sample may be "low-hanging fruit" (Line 1-2, Para. 6), the researchers meant that _______. A) the sample was favorable for their test B) the sample made the test more difficult C) the sample brought about litde benefits D) the sample produced unexpected results