Reading ___ the mind only with materials of knowledge; it is thinking that makes what we read ours.
A.rectifies
B.prolongs
C.minimizes
D.furnishes
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I'll ___ to ironing after I've finished the washing.
A.get around
B.get about
C.get through
D.get over
Mr. Brown said that he would ___ us to have dinner together this weekend.
A.call on
B.call off
C.call for
D.call up
We ___ the boat by the bank.
A.fastened
B.tied
C.bound
D.moored
血浆蛋白质的等电点大多为pH5-6,它们在血液中的主要存在形式是
A. 带正电荷
B. 带负电荷
C. 兼性离子
D. 非极性分子
E. 疏水分子