选择恰当的字填在括号里。 企启（ ）程 濒频（ ）临 尖坚（ ）硬 境镜 （ ）界

患者，男性，43岁。进食大量油腻食物后出现腹痛，位于中上腹，向腰背部放射，取弯腰抱膝位可减轻疼痛，CT提示胰头模糊不清，腹部胀气。以下指标对评价预后没有意义的是（）

A.增高的血清淀粉酶

B.出现严重的低钙血症，血钙＜1.6mmol／L

C.Ranson评分≥3分

D.APACHEⅡ≥8分

E.腰肋部皮下瘀斑

HPMCP可做为片剂的何种材料

A、肠溶衣

B、糖衣

C、胃溶衣

D、崩解剂

E、润滑剂

试述《领导干部的楷模——孔繁森》这篇新闻作品的主要特点。

对于在一密闭容器中进行如下反应：C(S)+O₂(g)=CO₂(g)下列说法错误的是（    ）。

A．将木炭粉碎成粉末状可以加快化学反应速率

B．升高温度可以加快化学反应速率

C．增加压强可以加快化学反应速率

D．增加木炭的量可以加快化学反应速率

Low-income families are often unable to afford as much child care as they need. One government program would award low-income femilies a refund on the income taxes they pay of as much as $1,000 for each child under age four. This program would make it possible for all low-income families with children under age four to obtain more child care than they otherwise would have been able to afford.
Which of the following, if true, most seriously calls into question the claim that the program would make it possible for all low-income families to obtain more child care

A．The average family with children under age four spends more than $1,000 a year on child care.

B．Some low-income families in which one of the parents is usually available to care for children under age four may not want to spend their income tax refund on child care.

C．The reduction in government revenues stemming from the income tax refund will necessitate cuts in other government programs, such as grants for higher education.

D．Many low-income families with children under age four do not pay any income taxes because their total income is too low to be subject to such taxes.

E．(E) Income taxes have increased substantially over the past twenty years, reducing the money that low-income families have available to spend on child care.