Questions 47 to 56 are based on the following passage.
People who have (47) difficulty with reading, writing, listening or working with numbers might have a learning disability. We talked last week about a reading disorder, dyslexia (说话障碍) . Today we discuss a (48) disorder, dysgraphia (书写困难) .
Writing is not a (an) (49) skill. Not only does it require the ability to organize and (50) ideas in the mind, it also (51) the ability to get the muscles in the hands and fingers to form those ideas, letter by letter, on paper.
Experts say teachers and parents should suspect dysgraphia if a child’s handwriting is unusually difficult to read. Letters might be sized or spaced incorrectly. Capital letters might be in the (52) places, The child’s hand, body or paper might be in a strange position. These can all be signs of dysgrapbia. (53) problems can also be related to the disorder.
Many people have (54) handwriting, but dysgraphia is more serious. Dsygraphia is a neurological (神经性的) (55) that generally appears when children are first learning to write. Writing by hand can be physically (56) for people who have it.
A) poorI) writing
B) appearsJ) Spelling
C) expressK) difficult
D) unusualL) easy
E) painfulM) tell
F) normalN) wrong
G) helpsO) disorder
H) requires

根据《水利水电建筑安装安全技术工作规程》(SD 267—88)，照明设备拆除后，不得留有带电的部分，如必要保留时，则应切断电源，线头包以绝缘，固定于距地面( )以上的适当处。

A．1.0,

B．1.5m

C．2.0m

D．2.5m