Abstract: A three-dimensional printing apparatus includes a liquid tank capable of accommodating a photosensitive liquid. The liquid tank includes a film, a plurality of side walls, a plate and a motor. The film has a workpiece curing area. The plurality of side walls surrounds the film. The plate is capable of supporting the film and having at least one fluid tunnel extending from a first surface of the plate contacting the film to a second surface of the plate. The motor is connected to the liquid tank to incline the liquid tank. A gap is formed between the plat and one of the plurality of side walls of the liquid tank, and the film is communicated with an outside space via the gap.

Abstract: Keywords: computer assisted test, test assessment, test collection, distant learning. The main problem with the network test base system is that there are neither sufficiently many nor good enough test items. To satisfy these two points, there must be more test item resources and a mechanism for assessing test items to determine whether a test item should stay in the test base. The present invention provides a method for automation of dynamic test item collection and assessment, which allows teacher and students to contribute test items to the test base and each independently managed test base can share test items. This can make the test base rapidly grow and expand the size of a test base. The more independent the student are, the higher the applicability of this method is.