老年人突然发生以下哪种或哪几种情况需做心电图检查以排除急性心肌梗死（） A.原因不明

阅读理解。

     A father asks his son, "How many letters are there in the alphabet?" "I don't know," says his son. His

father says, "You don't know? You are in school for many years and you don't know how many letters

there are in the alphabet?" He is very angry. His son says, "No. But let me ask you a question, Dad. You

often go to the post office, please tell me how many letters there are in the post office?"

根据短文内容判断句子正（T）误（F）。

( )1. From this story, we know the son is good at English.

( )2. The son studies at school over (超过) one year.

( )3. The father gets angry because his son is not polite (有礼貌) to him.

( )4. The father knows how many letters there are in the post office.

( )5. There are twenty-six letters in the alphabet.

能在HAT培养基上生长繁殖的细胞有（）

A.正常培养细胞

B.TK缺陷细胞

C.HGPRT缺陷细胞

D.细胞多聚体

E.杂交瘤细胞

请分析下面这幅大学新生入学的漫画，给它拟一个恰当的标题(10字以内，不得以“无题”为标题)，并写出你对这幅漫画内容的评价(50字以内)。(5分)

要求：思想健康，表意明确，语句连贯得体。

读“我国人口增长曲线图”，回答问题：

（1）从图上看出，旧中国在较长的历史时期中，由于战争、疫病等原因，死亡率   _____，人口增长   _____。

（2）新中国成立后，人口增长基本上呈    _____上升。

（3）人是生产者，又是   ____者，人口数量的增长应与    ____的发展和   _____的条件相适应，为此我国政府把实行   ___作为一项长期的基本国策，控制人口    __，提高人口    ___。具体要求是：    ____、晚育、少生、    _____。

驾驶员温度设定电阻器是一个（）。

A.热敏电阻

B.可变电阻器

C.光敏电阻

D.精制电阻