下图是光合作用过程的图解，请分析并回答相关问题。图中H过程表示（），I过程表示（）

一块电流表的内阻大约是几百欧，某同学用如图所示的电路测量其内阻和满偏电流，部分实验步骤如下：

①选择器材：两个电阻箱、2节干电池（每节电动势为1.5V，内阻不计）、2个单刀单掷开关和若干导线；

②按如图所示的电路图连接好器材，断开开关S₁、S₂，将电阻箱1的电阻调至最大；

③闭合开关S₁，调节电阻箱1，并同时观察电流表指针，当指针处于满偏刻度时，读取电阻箱1的阻值为500Ω；

④保持电阻箱1的电阻不变，再闭合开关S₂，只调节电阻箱2，并同时观测电流表指针，当指针处于半偏刻度时，读取电阻箱2的阻值为250Ω．

通过分析与计算可知：

（1）电流表内阻的测量值R_A=______；电流表的满偏电流值I_g=______；

（2）该同学对此电流表进行改装，使改装后的电流表量程为3A，则改装后的电流表的内阻

带锯机安装锯条时，锯卡子高低应调整合适，如过高则锯条容易（）

A、滑托

B、掉齿

C、晃动

D、裂口

Compared to people with bad attitudes，people who are cheerful and relaxed are less likely to suffer from colds，according to a new study.“It’s possible that being upbeat helps the body fight illnesses，” says Sheldon Cohen，the study’s lead researcher from Carnegie Mellon University (CMU) in Pittsburgh.

In a previous（先前的） study，Cohen and his colleagues put cold­causing viruses into the noses of 334 healthy adults. People who tended to be cheerful and lively were least likely to develop sniffles，coughs，and other cold symptoms. People who showed positive feelings were also less likely to mention symptoms to their doctors，even when medical tests detected those symptoms.

Those findings were interesting，but they didn’t prove that a person’s attitude affects whether he or she gets sick. Instead，it was still possible that a person’s underlying personality is what matters. Evidence suggests，for instance，that certain people are naturally more likely to be outgoing and optimistic，with high self­esteem and a sense of control over life. This would mean that who we are，not how we feel，ultimately decides our chances of catching colds.

To figure out which mattered more (personality or emotions)，the CMU team interviewed 193 healthy adults. The researchers talked to each person over the phone every evening for 2 weeks. At the end of the interviewing period，people got nose drops that contained either cold or flu viruses. Then，each person stayed in an isolated room for 5 or 6 days. The results showed that everyone in the study was equally likely to get infected. Their symptoms，however，differed depending on the types of emotions that they had reported over the previous 2 weeks. Among those who reported good moods and had been infected with the flu virus，for example,28 percent developed coughs and stuffy noses. On the other hand，those symptoms struck 41 percent of people who had been less upbeat.

小题1:

What would be the best title for the passage?

A．Smiles Turn away Colds

B．An Interesting Way to Beat Colds

C．Be Outgoing and Optimistic to Fight Colds

D．What Matters More，Personality or Emotions?小题2:

In the previous study，people who showed positive feelings______.

A．didn’t catch colds as often

B．developed cold symptoms more slowly

C．were less likely to have cold symptoms detected

D．were less likely to feel cold symptoms小题3:

What mainly decides our chances of catching colds according to the new study?

A．Personality.

B．Self­esteem（自尊）.

C．Emotions.

D．Attitudes.小题4:

The underlined word “symptoms” probably means________.

A．something that causes cold

B．something that results in cold

C．signs that something exists，especially something bad

D．changes in your body or mind that show that you are not healthy

在下列各项中，注册会计师所需审计证据的数量与( )成反向关系。

A．为降低的检查风险

B．估计的固有风险和控制风险

C．注册会计师及其助理人员的审计经验

D．具体审计项目的重要程度

河流、湖泊中______超出规定标准的现象称为水体的富营养化。