“翼龙”无人机
“翼龙”无人机是我国自主研制的一种中低空、长航时、多用途无人机．图甲所示是无人机的图片，下表为其部分技术参数．
“翼龙”无人机装配有一台活塞式发动机，具备全自主平台，可携带各种侦察、测距、电子对抗设备及小型空地打击武器，可广泛应用于如灾情监视、军事活动等科学研究领域．
最大飞行速度km/h
280
正常巡航速度km/h
160
最大续航时间h
20
发动机额定功率kW
75
最大载荷量kg
200
最大载燃油量kg
300
机身质量t
1.1
机身长度m
9.0
Mary likes to invent things. She creates a new language and teaches it to her friend, Jean. Mary and Jean like to talk to each other in their own language because they think no one understands them and it is funny. When they go shopping, they say things like: "Look! He is fat.” “This CD is awful." "I want to eat free hamburgers.”A clerk comes but he can't understand what they say. He asked them: “May I help you?”Mary and Jean just laugh. What fun it is to create something new.
中国无产阶级登上历史舞台是在( )
对于逆反心理产生的原因，认识正确的是（ ）
下面三组句子，各表现了母亲在希望破灭时怎样的心理？
①母亲也怕起来，吞吞吐吐地说：“你疯了，既然你知道不是他，为什么这样胡说八道？”
②母亲回来了。我看出她在哆嗦。她很快地说：“我想就是他。去跟船长打听一下吧………”
③母亲突然暴怒起来，说：“我就知道这个贼是不会有出息的，早晚会重新回来拖累我们的……”
