阐明三羧酸循环的科学家是
A.J.D.Watson
B.H.A.Krebs
C.L. C. Pauling
D.J.B.Sumner
参考答案:B
没想到他很痛快地答应了星期一来参加我们的招待会。
A.回答
B.解答
C.解决
D.同意
—Why do you suggest we buy a new machine?
—Because the old one has been damaged ________.[ ]
A. beyond reach
B. beyond repair
C. beyond control
D. beyond description