【单选题】Recently, great advances have been made in the study of Venus' surface by the use of radar waves to______ the dense cloud layer.
A.persecute
B.pierce
C.penetrate
D.plunge
【单选题】Recently, great advances have been made in the study of Venus' surface by the use of radar waves to______ the dense cloud layer.
A.persecute
B.pierce
C.penetrate
D.plunge
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