2. 外语
  3. Recently, great advances have been made in the study of Venus’ surface by the use of radar waves to______ the dense cloud layer.

Recently, great advances have been made in the study of Venus’ surface by the use of radar waves to______ the dense cloud layer.

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问题 Recently, great advances have been made in the study of Venus’ surface by the use of radar waves to______ the dense cloud layer.
选项 A、persecute
B、pierce
C、penetrate
D、plunge
答案C
解析 penetrate，“穿过”、“渗入”，如：The knife penetrated her finger and made it bleed．小刀扎破了她的手指，出血了。 pierce，“刺破”、“刺穿”，如：The needle pierced the material．这根针刺穿了织物。persecute，“迫害”：
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