【单选题】【消耗次数：1】
22、采煤机割煤后，支架依次或分组随机立即前移、支护顶板，输送机随移架逐段移向煤壁，推移步距等于采煤机截深。这种支护方式称为（ ）。
①
顺序支护
②
及时支护方式
③
滞后支护式
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相关题目
【单选题】
21、综采工作面支架沿采煤机牵引方向依次前移，移动步距等于截深，支架移成—条直线，这种一家方式为（ ）。
①
单架依次顺序式
②
分组间隔交错式
③
成组整体依次顺序式
随机题目
【单选题】
—Good morning, John. How are you doing？—____.
①
Im pleased.
②
Good night.
③
Not so bad. And you?
④
How do you do?
【单选题】
16. By using virtual reality programmes, it is possible to ____ deep into outer space without ever leaving Earth.
①
explore
②
find
③
escape
④
stay
【单选题】
Three-fourths of the homework ____ today.
①
has finished
②
has been finished
③
have finished
④
have been finished
【单选题】
Not until the early years of the 19th century ____ what heat is.
①
man knew
②
did man know
③
man did know
④
didn’t man know
【单选题】
The gate is too____ for a car; we’ll have to walk through. ?
①
shallow ?
②
loose ?
③
broad ?
④
narrow?
【单选题】
I’d like to ____ a single room at the holiday inn for two days.
①
serve
②
conserve
③
preserve
④
reserve
【单选题】
27. The police are anxious to interview everyone ____ last night’s incident.
①
concerning
②
B. concerned about
③
concerned in
④
concerned for
【单选题】
John was going to ____ Mary by telling his friends how much weight she had gained.
①
essential
②
embarrass
③
elementary
④
consider