用酸度计测定溶液的PH值时，一般选用（）为指示电极。A、标准氢电极； B、饱和甘汞电

进行稀释式自体输血所采集的血液存放时间预计超过6小时，应将全血（）。

A.进行成分分离，将不同的血液成分分别存放

B.放置在4℃血库冰箱

C.放置在手术室室温

D.放置在4℃家用冰箱

E.放置在血库（输血科）室温

炼焦用煤要求（）。

A、硫分低

B、灰分小

C、磷含少

D、配合煤水分控制在10%左右为宜

男性，70岁，进行性排尿困难5年，尿潴留留置导尿4次，1年前曾测残余尿量100ml。查体：下腹膨胀，浊音界在脐下2指，右侧腹股沟区有一包块，肿块突入阴囊可以还纳。

假设需做前列腺切除术，手术是在假包膜内切除前列腺的增生部分，关于假包膜的形成正确的解释是（）

A.增生的前列腺体将中央带腺体压扁形成

B.增生的前列腺体将外周带腺体压扁形成

C.正常前列腺周围即存在该包膜

D.增生的前列腺体将移行带腺体压扁形成

E.由周围脂肪组织形成

在教学过程中，学生对客观世界的认识，主要是通过学习（）实现的。

A.生产经验

B.生活经验

C.直接经验

D.间接经验

Sadness isn’t manly—this Eric Weaver knew. When depression engulfed this New York police sergeant, it took a different guise: a near-constant state of anger. "One minute I’d be okay and the next minute I’d be screaming at my kids and punching the wall," he recalls. "My kids would ask, ’What’s wrong with Daddy Why’s he so mad all the time’" For years, Weaver didn’t know what was wrong.

Weaver’s confusion about what tortured him was not unusual. Roughly a third of the 18 million or more Americans who suffer depression each year are men. Yet all too often, experts say, men fail to recognize the symptoms and get the treatment they need.

For years, experts suspected that gender makes a big difference in depression. Studies from New York to New Zealand have repeatedly found the same startling statistic: About twice as many women as men suffer from depression. That finding was considered one of the bedrock facts of modern mental health. Yet it has recently come under attack from critics who are concerned about underreporting of male depression.

William Pollack, Director of the Center for Men at McLean Hospital, is leading the charge against the well-entrenched depression gender gap. He argues that men’s rate of depression may be nearly equal to women’s. Just look at suicide rates, he says: Male suicides outnumber females four to one. That ratio "is way too high to say that men’s depression numbers are so low," he notes.

Pollack and others contend that male depression goes unrecognized because, unlike the female version, it often doesn’t fit the textbook signs—at least in the early stages. Clinical depression at later stages looks much the same in both sexes. But in the prelude to a breakdown, that deepening despair is often expressed in very different ways. Instead of being weepy, men are more apt to be irritable and angry—moods that aren’t included in the classic diagnostic tests. "Their sadness and helplessness are hidden behind a mask of anger," says Pollack.

"Men tend to act out" to avoid dealing with uncomfortable feelings, adds Fredric Rabinowitz, a psychologist who works primarily with men. If they feel bad, they’re apt to get into fights on the job or at home, withdraw from family and friends, become obsessed with work or hobbies. Most significantly, men often turn to drinking or drugs. Men have two to four times the rate of substance abuse problems as women, and Pollack contends that if this was recognized as a sign of depression, the gender gap would substantially narrow.

According to the passage, Mr. Pollack believes that men facing depression（）

A. will choose to commit suicide

B. break down more easily than women

C. do not have the same symptoms as described in textbook

D. are often not diagnosed properly