单项选择题
平飞时飞机重心会在纵向前后移动，需要不断调整操纵面保持平衡，此过程称为( )。
A、俯仰配平
B、俯仰操纵
C、方向操纵
D、方向配平
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单项选择题
- Quelle est votre nationalité ? - Je（ ）allmande. A、 es B、 suis C、 est D、 être -
未知题型
Most children with healthy appetites are ready to eat almost anything that is offered them and a child rarely dislikes food (1)_____ it is badly cookeD.The (2)_____ a meal is cooked and served is most important and an (3)_____ served meal will, often improve a child's appetitE.Never ask a child (4)_____ he likes or dislike a food and never (5)_____ likes and dislikes in front of him or allow (6)_____ else to do so. If the father says he hates fat meat or the mother (7)_____ vegetables in the child's hearing he is (8)_____ to copy this procedurE.Take it (9)_____ granted that he likes everything and he probably (10)_____. Nothing healthful should be omitted from the meal because of a (11)_____ dislikE.At meal times it is a good (12)_____ to give a child a small portion and let him (13)_____ back for a second helping rather than give him as (14)_____ as he is likely to eat all at oncE.Do not talk too much to the child (15)_____ meal times, but let him get on with his food: and do not (16)_____ him to leave the table immediately after a meal or he will (17)_____ learn to swallow his food (18)_____ he can hurry back to his toys. Under (19)_____ circumstances must a child be coaxed (20)_____ forced to eat.A.ifB.untilC.thatD.unless
A.A.if
B.until
C.that -
多项选择题
实验结果是（ ）。 A. 实验中的观察过程 B. 实验中的各种被观察到的现象 C. 实验现象的动态变化过程 D. 实验所得到各种数据资料 E. 实验数据的推导、计算过程或公式
