患者，男，53岁，颅内肿瘤，术后入ICU进行监护，初期定为神经系统1级监护观察神志。

The 3G cell-phone must be of great use to ______ wants to get the information through the Internet quickly.

A．who

B．whoever

C．whomever

D．whichever

假设¹²C相对原子质量为24，如果以0. 024kg¹²C所含的原子数为阿伏加德罗常数，下列数值中肯定不变的是[ ]

A．气体摩尔体积（标准状况）

B．标准状况下l6g O₂所占体积

C．O₂的相对分子质量

D．一定条件下，跟2gH₂相化合的O₂的物质的量

_______, and students having returned, the school will start with ________ effort in the work that lies before it.

A．The summer vacation is over; refreshing

B．As the summer vacation over; renewed

C．The summer vacation being over; renewed

D．With the summer vacation being over; refreshing

三项连比的性质是：（1）______．（2）______．