为确保昏迷患者的呼吸道通畅，应置患者头_________并稍_________。
参考答案：偏向一侧；后仰
—Dinner is ready. Help yourself!
—Wow! It ________ delicious. Could you please tell me how to cook it?
A．tastes
B．looks
C．sounds
D．feels
如图所示为四个物体做直线运动的速度—时间(v-t)图像，由图像可知,做匀减速直线运动的是（ ）
