我们每个人都能在班级中找到自己的位置,谁都无法替代。 [ ]
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What can be inferred about Dr. Smith().
A.Dr. Smith was very busy.
B.It’s hard to get an appointment with Dr. Smith.
C.Dr. Smith didn’t put me on his schedule.
鸡、鸭等小动物血液样品的采集量一般为()。
A、0.5-1ml
B、1-2ml
C、2-4ml