我国学者一般把完全形成的人分为()
①早期猿人和晚期猿人 ②早期智人和晚期智人
A. ③腊玛古猿和
B. 南方古猿
C. ④埃及古
D. 猿和森林古猿
复合管的穿透电流等于组成它的各三极管穿透电流之和。()
A. 正确
B. 错误
A．on thatB．on whichC．at thatD．at which
A. on that
B. on which
C. at that
D. at which
—Hello! Can I speak to Alice, please？ —Sorry. She isn’t in at the moment. —______？ Please
A. Could I leave a message
B. Can you hold the line
C. Will you put me through
D. May I take a message
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