【单选题】变量$a='abcd',需要把变量写如文件'file.txt'中,应该
A.
fwrite('file.txt',$a);
B.
file_put_contents($a,'file.txt');
C.
file_put_contents('file.txt',$a);
D.
file_get_contents('file.txt',$a);
【单选题】质粒实际基因工程中常用的运载体,它的主要特点是 1能自主复制2不能自主复制3结构很小4蛋白质5环状RNA6环状DNA7能“友好”地”借居“
【判断题】测定砂的松散堆积密度的公式中,G1为容量筒质量。
【单选题】In the United States, it is the ______ that formulates foreign policy and prepares laws for the home front.
【单选题】According to the passage, the United States______.
A.
has begun to give much attention to football
B.
is fond of playing football
C.
has won the football World Cup
D.
is getting sick of football
【单选题】111分子葡萄糖酵解时可净生成几分子ATP
【简答题】My mother is a teacher work in a key high school. She is too busy that she often has to get up early and stay up late. In addition to this, she hardly has any times to take exercise. She has been on p...
【单选题】( )的岗位职责是为客房服务输送物品;打扫楼面公共区域卫生;收发洗涤的客衣;完成领班或台班指派的临时任务;能正确使用清洁剂对杯具进行消毒清洗;能用外语进行简单的会话。