对于多轴飞行器动力电源充电,以下哪种充电方法是错误的() A.聚合物锂电池单体充至4

题型:单项选择题

问题:

对于多轴飞行器动力电源充电,以下哪种充电方法是错误的()

A.聚合物锂电池单体充至4.6V满电

B.聚合物锂电池单体充至4.2V满电

C.磷酸铁锂电池单体充至3.6V满电

考点:无人机AOPA驾驶证考试多旋翼多轴飞行器多旋翼多轴飞行器题库
题型:单项选择题

以下的“水”属于纯净物的是

A.雨水

B.消毒水

C.泪水

D.蒸馏水

题型:单项选择题

GB/T23331-2012与GB/T23331-2009相比增加了术语:().

A.边界

B.能源

C.能源基准

D.能源因素

题型:单项选择题

阅读下面的短文,并根据短文后的要求答题(请注意问题后的字数要求)。

Each spring brings a new blossom of wildflowers in the ditches (路沟) along the highway I travel daily to work.

There is one particular blue flower that has always caught my eye. I've noticed that it blooms only in the morning hours, the afternoon sun is too warm for it. Every day for approximately two weeks, I see those beautiful flowers.

This spring, I started a wildflower garden in our yard. I can look out of the kitchen window while doing the dishes and see the flowers. I've often thought that those lovely blue flowers from the ditch would look great in that bed alongside other wildflowers.

Everyday I drove past the flowers thinking, “I’ll stop on my way home and dig them.” “Gee, I don’t want to get my good clothes dirty...” Whatever the reason, I never stopped to dig them. My husband even gave me a folding shovel(钎) one year to be used for that expressed purpose.

One day on my way home from work, I was saddened to see that the highway department had mowed the ditches and the pretty blue flowers were gone. I thought to myself, “Way to go, you waited too long. You should have done it when you first saw them blooming this spring.”

A week ago we            that my oldest sister-in-law has a terminal brain tumor(脑瘤晚期). She is 20 years older than my husband and unfortunately, because of age and distance, we haven’t been as close as we all would have liked.

I couldn’t help but see the connection between the pretty blue flowers and the relationship between my husband's sister and us. I do believe that God has given us some time left to plant some wonderful memories that will bloom every year for us.

And yes, if I see the blue flowers again, you can bet I’ll stop and transplant them to my wildflower garden.

小题1:What’s the best title of the passage? (within 10 words)

                                                                             

小题2:Fill in the blank in the last but two paragraphs with proper words or phrases to complete the sentence. (within 10 words)

                                                                             

小题3:Which sentence in the passage can be replaced by the following one?

I had wanted to stop and dig them but I didn’t make it anyhow.

                                                                             

                                                                             

小题4:Translate the underlined sentence in the last but one paragraph into Chinese.

                                                                             

                                                                             

小题5:What do you learn from the passage? (within 30 words)

                                                                             

                                                                             

题型:单项选择题

余额试算平衡是由“资产=负债+所有者权益”的恒等关系决定的。

题型:单项选择题

包年期间取消农信通后,再次开通是否会重新扣费?

更多题库