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举一反三
【单选题】Ladies and gentlemen, welcome to Dalian, a famous summer resort ( 避暑胜地 ) and one of the best tourist cities in China. With clear sky, green mountains, blue seas, fine beaches, clean streets and lovely...
A.
comes in the best season.
B.
is here to join more tourists
C.
may not stand the heat here.
D.
is traveling back home.
【单选题】小刚同学正在用显微镜观察洋葱鳞片叶表皮细胞，显微镜的目镜有5×和10×两种，物镜有10×和40×两种，下列组合中观察到细胞数目最少的是 [ ]
A.
目镜5×，物镜l0×
B.
目镜10×，物镜10 ×
C.
目镜5×，物镜40×
D.
目镜10×，物镜40×