一台压缩机组的名义工况制冷量为1864kW，电功率为416kW，则此机组在名义工况下

关于慢性肺源性心脏病右心功能不全的体征的叙述，以下不正确的是（）

A.双下肺湿性啰音

B.颈静脉怒张

C.下肢水肿

D.上腹胀痛

E.肝大

已知CaCO₃+H₂O+CO₂===Ca(HCO₃)₂，Ca(HCO₃)₂易溶于水。某实验小组在含一定量Ca(OH)₂的石灰水中通入CO₂，产生沉淀的量与通入CO₂气体的量的关系如图所示，回答下列问题：

(1)写出石灰水中刚通入CO₂时的化学方程式                      。

(2) 至少通入             gCO₂气体，溶液的质量是整个实验过程中溶液质量的最大值（不考虑CO₂气体在水中的溶解性）。

(3) 请描述整个实验过程的现象                        。

Dear Hamilton,

We are fortunate that in such a large, high-pressure office we all get along so well. You are one of the people who keep the social temperature at such a comfortable setting. I don’t know anyone in the office who is better liked than you.

You can perhaps help with this. The collection of contributions towards gifts for employees’ personal-life events is becoming a little troubling. Certainly, the group sending of a gift is reasonable now and then. In the past month, however, there have been collections for two baby shower gifts, one wedding shower gift, two wedding gifts, one funeral（葬礼）remembrance, four birthday gifts, and three graduation gifts.

It’s not only the collected-from who are growing uncomfortable (and poor), but the collected-for feel uneasy receiving gifts from people who don’t know them outside the office, who wouldn’t even recognize their graduating children, their marrying daughters and sons, or their dead relatives.

This is basically a kind gesture (and one that people think well of you for), but the practice seems to have become too wide-ranging and feels improper in today’s office setting.

Thank you for understanding.

小题1:The underlined word “contributions” probably means ________.

A．money

B．suggestions

C．reports

D．understanding小题2:Hamilton is expected to _______.

A．show more kindness.

B．discontinue the present practice

C．quit being the organizer for gift giving

D．know more about co-workers’ families小题3:This is basically a letter of ________.

A．apology

B．sympathy

C．appreciation

D．dissatisfaction

关于电器仪表的安全使用，以下说法不正确的是（）。

A、在使用前，先了解电器仪表要求使用的电源是交流电还是直流电；是三相电还是单相电以及电压的大小

B、实验之前要检查线路连接是否正确，检查无误后方可接通电源

C、仪表量程应大于待测量。若待测量大小不明时，应从最小量程开始测量

D、在电器仪表使用过程中，如发现有不正常声响，局部温升或嗅到绝缘漆过热产生的焦味，应立即切断电源，并报告教师进行检查。

耐信是新一代的（）

A.M受体阻断剂

B.Na+ -K+ ATP酶抑制剂

C.质子泵抑制剂

D.全部都不是