发包方有义务维护承包方的土地承包经营权，不得非法（）、（）合同。

初产妇，24岁，足月， * * 流液伴腹痛3小时入院。主诉宫缩剂疼痛难忍，食欲差。骨盆外测量：髂棘间径26cm，髂嵴间径28cm，骶耻外径19cm，坐骨结节间径9cm。检查：宫缩规律，枕左前位，胎心率145次／分，先露头已入盆，宫口开大2cm，以破膜。

下列正确的一项是（）。

A.滞产

B.急产

C.正常产程

D.加速期延缓

E.继发性宫缩乏力

The following two questions are based on the following passage:

An automaker is facing financial difficulties. The vice president of marketing has determined that the root of the company’s problems is low brand loyalty. The vice president proposes, therefore, that the company begin an aggressive advertising campaign focused on children aged from three to eight years. By securing p brand recognition with this demographic, he argues, the company will have an advantage when these customers reach an age when they can buy cars.

Which of the following, if true, raises the most serious doubts about the vice president’s proposal ？（）

A. Studies have shown that children are an important factor in the car-buying decision for 75 percent of parents with children under 18 years of age.

B. The financial difficulties facing the company will result in the company’s declaring bankruptcy within five years if the difficulties are not addressed effectively.

C. The company’s most recent advertising campaign, focused on the theme of "Rev up your life," has received positive ratings from the demographic aged 18 to 29.

D. Children are accustomed to viewing ads for car toys while watching their favorite television programs, so ads for actual cars will appeal to them.

E. The vice president who made the proposal has only one year of experience in the automotive industry, but has spent more than 20 years in the financial services and children’s entertainment industries.

某数据库中有供应商关系S 和零件关系P，其中：供应商关系模式S（Sno，Sname，SZip，City）中的属性分别表示：供应商代码、供应商名、邮编、供应商所在城市；零件关系模式P（Pno，Pname，Color，Weight，City）中的属性分别表示：零件号、零件名、颜色、重量、产地。要求一个供应商可以供应多种零件，而一种零件可以由多个供应商供应。请将下面的SQL语句空缺部分补充完整。 CREATE TABLE SP（Sno CHAR(5)， Pno CHAR(6)， Status CHAR(8)， Qty NUMERIC（9）， （33） （Sno，Pno）， （34） （Sno）， （35） （Pno））； 查询供应了“红”色零件的供应商号、零件号和数量（Qty）的元组演算表达式为：

（35）应选择（）

A．FOREIGN KEY

B．PRIMARY KEY

C．FOREIGN KEY（Sno） REFERENCES S

D．FOREIGN KEY（Pno） REFERENCES P

通过搅拌的物理运动，使面坯膨松而制成的面坯，行业中也称为蛋泡面坯。( )

在汽包双冲量控制系统中，双冲量指的是（）。

A、给水流量和蒸汽流量

B、蒸汽流量和汽包液位

C、给水流量和汽包液位

D、蒸汽压力和汽包液位