under no conditions
at a maximum rate of two ounces per day
if gathered during or immediately after a hard rain
after mixing with an equal quantity of fresh water
第1题：
A)using
B)use
C)to use
D)used
第2题：
A. The procedure may be used for some components to relocate component data to the SYSAUX tablespace from its current tablespace.
B. The procedure may be used for some components to relocate component data from the SYSAUX tablespace to another tablespace.
C. All the components may be moved into SYSAUX tablespace.
D. All the components may be moved from the SYSAUX tablespace.
第3题：
A.been used for
B.got used for
C.been used to
D.got used to
第4题：
What represents poor sanitary procedures ________．
A.Keep and use a separate filling hose for potable（drinking）water
B.Locate potable（drinking）water tanks as low as possible in the bilge
C.Eliminate enclosed spaces in which trash，food particles，dirt may gather
D.After washing dishes with soap and warm water，sterilize them in water of at least 170℉（76.7℃）
第5题：
（ ）Her son __________ Coke, but now he __________ milk.
A．used to drink；is used to drinking
B．used to drinking；drinks
C．is used to drinking；used to drink
D．is used to drink；is drinking
第6题：
第7题：
A. Either the -a or flag -b may be used, but not both.
B. If the flag -a is used then the flag -b also must be used.
C. One of the -a or -b flags must be used, but not both at the same time.
D. Both the flags may be used together, but neither are mandatory.
第8题：
In John Whitehead's opinion, which statement is true?
A．Face recognition technology may interfere with people's privacy.
B．Face recognition technology may enhance the country's constant surveillance.
C．Face recognition technology can be used in the same way wiretaps are used.
D．Face recognition technology can be used after its threat has been removed.
第9题：
A sling psychrometer is used to measure ______.
A.seawater temperature
B.engine temperature
C.dry bulb and wet bulb temperatures
D.barometric pressure
第10题：
When collecting condensation for drinking water，______．
A.A sponge used to mop up and store condensation must be kept salt free
B.Only condensation on the bottom of the canopy should be collected
C.It should be strained through a finely woven cloth
D.Chlorine tablets should be used to make it drinkable