【名词&注释】
电离平衡常数(ionization equilibrium constant)、合蕊柱(gynostemium)、一元酸(monoprotic acid)
[单选题]已知室温时，0.1mo1/L某一元酸HA在水中有0.1％发生电离，下列叙述错误的是：
A. 该溶液的pH=4
B. 升高温度，溶液的pH增大
C. 此酸的电离平衡常数约为1×10-7
D. 由HA电离出的c(H+)约为水电离出的c(H+)的106倍
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举一反三：
[单选题]萝摩科植物花较特化，具多种特殊构造，但并无( )。
A. 副萼
B. 载粉器
C. 花粉块
D. 合蕊柱
[单选题]地衣的有性生殖由共生的真菌和藻类共同完成。( )
A. 正确
B. 错误
[单选题]The palace eaught fire three times in the last century , and little of the original buliding________now .
A. remains B．is remained
B. is remaining D． has been remained
[单选题]What does the underlined word “anties” refer to?”
A. Smut words
B. Unusual actions.
C. Surprising Looks
D. Anxious feelings.
[单选题]Dr Smith, together with his wife and daughters, ______visit Beijing this summer.
A. is gong to
B. are going to
C. was going to
D. were going to
[单选题]
A. brave
B. careless
C. proud
D. selfish
[单选题]How many hours of housework did men do every week in the 1970s?
A. About 23.
B. About 26.
C. About 13.
D. About y.
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