旋光度为（）熔点为（）空白试验为（） A.液体药物的物理性质 B.不加供试品的情况下

语法填空（共10 小题；每小题1.5分,满分15分）

Americans love pets. In America, there are more families with pets    16   those with children. It is common    17    U.S. homes have some sort of pets, such as monkeys, snakes and even wolves. But Americans’ all-time favorites are cats and dogs, because dogs can offer protection from thieves and unwelcome visitors and cats can help get rid    18    the home unwanted pests. Beneath keeping pets, there lies a basic American belief: Pets have a right to be treated well. In Houston, Texas, dogs can have their dinner    19    (deliver) to their homes, just like pizza. Pets can even go with    20    owners on vacation. Besides, at least 75 animal welfare organizations exist in America    21    provide care and adoption services for    22    (home) and ill-treated animals. To pay for the high-tech health care, people can buy health insurance     23   their pets. Pets are as basic to American culture as hot dogs or apple pie. By now researchers    24    (discover) that interacting with animals lowers a person's blood pressure. Pets even encourage social relationships: They give their owners an appearance of friendliness, and they provide    25    good topic of conversation.

主治痰湿停滞导致的咳嗽痰多、胸脘胀闷、恶心呕吐的中成药是（）。

A.抗癌平丸

B.香砂平胃丸

C.二陈丸

D.七味都气丸

E.苏合香丸

两个行星的质量分别为m₁和m₂，绕太阳运行的轨道半径分别为r₁和r2，若它们只受太阳万有引力的作用，那么这两个行星向心加速度之比为（   ）     

A．1：1

B．m₁r₁/m₂r₂

C．m₁r₂/m₂r₁

D．

圆内最长的线段是（    ）。