Recently, great advances have been made in the study of Venus’ surface by the use of radar waves to _________ the dense cloud la

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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、pierce
B、penetrate
C、plunge
D、persecute

答案B

解析 考点  动词辨析。penetrate“穿透”;pierce“刺穿,刺破”,尤指用尖锐物穿孔;plunge“投入;跳入”; persecute“迫害”。
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