[单选题]取消信号：通知将前发信号取消。昼间——拢起的手信号旗，两臂于前下方交叉后，急向（ ）数次；夜间——红色灯光作圆形转动后，上下摇动。
A.上下摇动
B.左右小动
C.左右摇动
D.左右大动

British people are far more sophisticated about beverages than they were 50 years ago. Witness the Starbucks revolution and you’ll know where (1) goes. However, spurred on by recent studies suggesting that it can cut the risk of (2) and retard the aging process, tea is enjoying a (3) .
Although tea is available in more places than ever, it remains to be (4) of a typical British family.
If you are invited to an English home, (5) in the morning you get a cup of tea. It is either brought in by a heartily (6) or an almost malevolently silent maid. When you are (7) in your sweetest morning sleep you must not say: "Go away, you (8) ." On the contrary, you have to declare with your best five o’clock smile. "Thank you very much. I (9) a cup of tea, especially in the morning." If they leave you alone with the liquid you may pour it (10) !
Then you have (11) ; then you have tea at 11 o’clock in the morning; (12) ; then you have

The sudden up thrust of warm, moist air into the terrible cold of the frozen heights is what creates thunder. The sudden stronger rubbing together or two unlike forces (very warm air against very cold air) develops a kind of electricity called" static electricity". Its charges pro duce lightning and thunder. (46) Thus the violence of the thunderstorm is an almost direct result of millions of warm water drops being thrown into compatible masses of ice crystals--hitting them , rolling over them, melting them, or being frozen by them into snow or hail.
Exactly how the electric charge is developed by the many, complex forces of this battle of heat and cold is still a matter of opinion. Some scientists think the action of wind against the rain is the principal factor. (47) These scientists believe the wind tears off the outer surface of each falling drops, like pulling a sweater over a child’s head, making a fine negative charge while leaving the main