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【单选题】
消化部位在胃和小肠的物质是A.
蛋白质
B.
淀粉
C.
脂肪
D.
纤维素
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举一反三
【单选题】---Oh, Mrs. King, your dress looks nice. Is it new? ---No, I ______it since two years ago.
A.
had
B.
bought
C.
have had
D.
have bought
【简答题】在测定熔点时样品的熔点低于( )以下,可采用浓硫酸为加热液体, 但当高温时,浓硫酸将分解, 这时可采用热稳定性优良的( )为浴液。
【单选题】— Hi, Mrs. King, your dress looks nice. Is it new? — Oh, no, I bought it _____ .
A.
two years ago
B.
for two years
C.
in two years
D.
two years before
【单选题】—Oh, Mrs. King, your dress looks nice. Is it new? —No, I _ it for two weeks. [ ]
A.
had
B.
bought
C.
have had
D.
have bought
【简答题】在测定熔点时样品的熔点低于 ( )摄氏度以下,可采用浓硫酸为加热液体, 但当高温时,浓硫酸将分解, 这时可采用热稳定性优良的 ( )为浴液。
【单选题】—Oh, Mrs. King, your necklace looks nice. Is it new? —No, I _____ it for two years. [ ]
A.
had
B.
have had
C.
bought
D.
have bought
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