Passage 1Questions 1 to 5 are based on the following passage. The two claws of the mature American lobster are decidedly different from each other. The crusher claw is short and stout; the cutter claw is long and slender. (76) Such bilateral asymmetry, i
在使用某种测量仪器对某物体进行测量时，得到的长度测量结果为0.0168米，则这个测量结果有____位有效数字．在利用单摆测定重力加速度g的实验中，如果以悬线长当作摆长，则测得的重力加速度g的值与实际值相比____（填写“偏大”、“偏小”或“不变”）．