影响指示剂变色范围的因素是：①温度；②指示剂用量；③溶剂；④

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问题单项选择题

影响指示剂变色范围的因素是：①温度；②指示剂用量；③溶剂；④滴定程序；⑤中性电解质（）

A.①、②、③

B.①、②、⑤

C.③、④

D.②、③、④、⑤

E.①、②、③、④、⑤

答案

参考答案：E

阅读理解

读短文，判断句子的正(A)误(B)。

His first name is Jim. His last name is Green. His phone number is three-seven-six, five-five-o-three.

Her first name is Mary. Her last name is Smith. Her phone number is two-eight-one, o-five-nine-four.

( )1. His first name is Green.

( )2. Her last name is Smith.

( )3. His last name is Green.

( )4. Her phone number is 2810594.

( )5. His phone number is 3765053.

单项选择题

人在安静时能量代谢最稳定是处于下列哪种温度的环境中()

A．0～10℃

B．10～20℃

C．20～30℃

D．30～40℃

E．－10～0℃