【判断题】【消耗次数：1】
动物致死所需某种毒物的剂量浓度赿小，表示该物质毒性越大。
①
正确
②
错误
参考答案：
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相关题目
【单选题】
容易发生神经毒性的铋剂剂量是（ ）。
①
血铋浓度大于1.0μg/ml
②
血铋浓度大于0.01μg/mL
③
血铋浓度大于0.1μg/mL
④
血铋浓度大于0.2μg/mL
⑤
血铋浓度大于0.5μg/mL
随机题目
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It was_____ back home after the experiment.
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not until midnight did he go
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until midnight that he didn’ t go
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not until midnight that he went
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until midnight when he didn’ t go
【单选题】
The truck driver was fined for exceeding the speed
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range
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limit
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rule
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regulation
【单选题】
America will never again have as a nation the spirit of
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could
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did
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would
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was
【单选题】
The ____ problem of bring a spaceship back from the moon has been solved.
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technical
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technological
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technique
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technology
【单选题】
The boy has admitted to ____ the window while
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breaking
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having been broken
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break
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【单选题】
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take over
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take up
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take off
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take to
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My pain ____ apparent the moment I walked into
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must be
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must have been
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had been
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had to be
【单选题】
____ there is little we can do to modify the weather,
we can at least know what kind of weather to expect.
①
Since
②
When
③
While
④
Unless