问题
单项选择题
某男性患红绿色盲，他的妻子是红绿色盲基因的携带者，对他的子女表现型的预测应当是（）
A.儿子和女儿全部正常
B.儿子患病，女儿正常
C.儿子正常，女儿患病
D.儿子和女儿都有可能患病
答案
参考答案：D
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某男性患红绿色盲，他的妻子是红绿色盲基因的携带者，对他的子女表现型的预测应当是（）
A.儿子和女儿全部正常
B.儿子患病，女儿正常
C.儿子正常，女儿患病
D.儿子和女儿都有可能患病
参考答案：D
Every mobile phone has a ringtone(铃声). It tells you that someone is calling you. Now, there _ a ringtone called “mosquito tone(蚊子铃声)”.
Mosquito tone has a special . Only children and teenagers can hear it. Using it, students can receive calls and text messages in class the teacher will not realize what is happening. However, it also has a bad influence on their study if students use it in class.
“Not all the students are in mosquito tone.” Jerry Jones, a high school student of 17, says, “Using mosquito tone too often is bad for our hearing. I may use it for , but not in class
| 小题1: | A．be B．will be C．is D．was |
| 小题2: | A．sound B．voice C．noise D．music |
| 小题3: | A．and B．or C．then D．but |
| 小题4: | A．interest B．interested C．interests D．interesting |
| 小题5: | A．pleased B．pleasant C．pleasure D．please |