Pure science, leading to the construction of a microscope, ______.

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问题 Pure science, leading to the construction of a microscope,  ______.

选项 A、may lead to antiscientific, "impure" results
B、necessarily precedes applied science, leading to the discovery of a cell
C、is not always as pure as we suppose
D、necessarily results from applied science and the discovery of a cell

答案B

解析 stumble结结巴巴;rumble咕哝,自言自语;tumble摔倒,跌倒;jumble搞乱。
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