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【单选题】
制备格氏试剂需用下述( )化合物作为溶剂。A.
乙醇
B.
无水乙醇
C.
乙醚
D.
无水乙醚
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
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【简答题】Mary immediately felt uneasy when she found her cousin John _______ her. (gaze upon)
【单选题】Her gaze sharpened, as if she had seen something __________.
A.
peculiar
B.
characteristic
C.
unusual
【简答题】调式中的音、按照高低次序、由主音到主音排列起来就叫做（）
【单选题】The moment seemed to______out endlessly, his gaze travelling across her face, her neck, her shoulder, returning to her eyes.
A.
stretch
B.
expand
C.
skip
D.
slip
【简答题】Her gaze sharpened, as if she had seen something __________.
【单选题】一对传递动力的渐开线闭式直齿轮,主从、动轮均为 软齿面钢制齿轮,精度等级为 7 级,为了提高其齿面的 接触强度,在下列措施中最有效的是 。
A.
保持分度圆直径不变的前提下，增大齿轮齿数
B.
提高主从、动轮的齿面硬度
C.
增大齿根圆角半径
D.
在保持分度圆直径不变的前提下，增大齿轮模数
【简答题】The child was unaffected by the chaos because of her mother ’ s gaze.
【单选题】He offered to ______ her a hand, as the suitcase was too heavy for her to carry.
A.
help
B.
show
C.
lend
D.
load
【简答题】A prolonged gaze or stare in the United States is considered_____________.
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